Mercedes S-class W202

1993-2000 of release

Repair and car operation

Mercedes W202
+ 1.2. The general data
+ 2. Maintenance service
+ 3. Engines
+ 4. Greasing system
+ 5. Cooling system
+ 6. Heating, ventilation
+ 7. Ignition system
+ 8. Fuel system
+ 9. Transmission
+ 10. A running gear
+ 11. A steering
- 12. Brake system
   12.2. Antiblocking system – ABS
   12.3. The additional equipment – system ASR
   12.4. Specifications of brake system
   12.5. Overlays of lobbies brake колодок
   + 12.6. Overlays of back disk brakes
   12.7. A support
   12.8. A forward brake disk
   12.9. A back brake disk
   12.10. A brake liquid
   12.11. Removal of air from brake system
   12.12. Brake pipelines / hoses
   12.13. Replacement of brake highways
   12.14. Brake колодки a lay brake
   12.15. Adjustment of a lay brake
   12.16. The stoplight switch
   12.17. Diagnostics of malfunctions of brakes
   + 12.18. Wheels and tyres
+ 13. A body
+ 14. An electric equipment
+ 14.2. Electroschemes

12.7. A support

Support of a forward wheel

Support of a back wheel


1. Mark with a paint position of wheels concerning a nave. Thanks to it отбалансированное the wheel after removal can be put on the place that balancing was not broke. Release wheel bolts, without lifting the car, then put the car on supports and remove wheels.
2. Switch off ignition. Unscrew and get the gauge of number of turns of system ABS (L6/1).
3. Unscrew 2 bolts of fastening of a brake support of a back wheel (35) to the case of bearings of a wheel and remove it outside.
4. Suspend a support by means of a self-made hook to a body so that were not overwound and the brake hose and a wire of the gauge of deterioration of brake overlays were not drawn.
5. If the support has to be removed completely, unscrew at first a brake hose (51) from a hydrowire, applying for this purpose open double накидной a key 9х11 mm. Then unscrew a brake hose from a support.
The prevention

The brake liquid will begin to flow. Close immediately apertures заглушками that the tank has not become empty. After installation the brake system needs to be pumped over. In cars with антипробуксовочной system ASR for prorolling of brakes the special device applied in specialised workshops is required. A following brake liquid collect in specially intended capacity. Observe instructions under the reference with a brake liquid (subsection 12.10 see.).

6. Disconnect the gauge of deterioration of overlays on a support socket. Unscrew a socket from a support.


1. At replacement keep in mind: the brake mechanism on both wheels of one axis should have identical pistons of the same manufacturer.
2. Forward brakes: put a support and tighten it to a nave two new самоконтрящимися bolts with the moment 115 Н.м.
The prevention

If bolts go hard, clear a carving of the rests of fixing means by means of the M tap 12х1,5.

3. Back brakes: put a support and fix two new самоконтрящимися bolts on a nave with the moment 50 Н.м., in cars with system ASR – 70 Н.м.
The prevention

If bolts go hard, clear a carving of the rests of fixing means by means of a tap of M 10.

4. If the brake hose acted in film, screw it with the moment 15 Н.м. To a hydrowire. At installation the hose cannot be overwound. On an arm (52) the lock plate (60) with двенадцатигранником is fixed. A brake hose (51) insert into a lock plate so that it went freely at full turn of a wheel to the left and to the right, at compression and a stretching of a spring of a suspension bracket. 4 – a hydrowire, 13 – накидной the screw, 59 – an arm of a brake hose.
5. Grease an aperture for the gauge of number of turns of system ABS with means Molykote Longtherm 2. Check up a ring of round section, if necessary – replace. Put the gauge of number of turns, having tightened its new bolt with internal шестигранником with the moment 20 Н.м.,
6. Connect a wire of the gauge of deterioration of overlays to a socket on a support.
7. If the brake system opened, pump over brakes.
8. Put wheels so that the marks put before their removal have coincided. Screw wheels. Remove the car from supports and tighten wheel bolts in a crosswise order with the moment 110 Н.м.
The prevention

Vigorously repeatedly понажимайте on a brake pedal, will not feel yet strong resistance. Thanks to it there is an adjustment of brake overlays.

9. Check up level of a brake liquid in a tank, if necessary add to the maximum mark.
The prevention

Carry out the safety control:
      – Whether brake hoses are tightened;
      – Whether there is a brake hose in an arm;
      – Whether prorolling screws are tightened;
      – Whether level of a brake liquid is perfectly in order

  At the working engine make the tightness control. For this purpose press a pedal of a brake with effort from 200 to 300 Н (20–30 kg) within approximately 10 seconds. The pedal should not move. Check tightness of all connections.

10. In summary make some braking in silent street.